I have had a Fronius IG5100 inverter for 8 years. It came with a 10 year warranty. It has failed three times. The first time, the installer put a new one in. The second time, Fronius sent a refurbished one that cost me $350 to install. That replacement lasted two weeks. Now I have to have yet another (refurbished) one installed at what will likely be another $350 at least. The Fronius warranty is a joke. Choose another brand.